I rather think Blockland is in the middle of Roblox and Minecraft, suggesting in gameplay. Blockland varys with more possibilities with events, along with Minecraft with Redstone inventions which is also just like Logic Gates. Blockland is more capable of creating different things with Torque Coding, which is not that hard to understand until you come up to strings and TCP Objects. Along with Minecraft there is community modifications along with it although much more complex to understand and create. Roblox, eh, haven't heard much about it when I was little. But what I could understand is which it does also have community mods as well as being a sandbox game, so goes with both Blockland and Minecraft. I think theres basically no difference in ideas between both games, they are the same in different varieties.